// jQuery Alert Dialogs Plugin
//
// Version 1.1
//
// Cory S.N. LaViska
// A Beautiful Site (http://abeautifulsite.net/)
// 14 May 2009
//
// Website: http://abeautifulsite.net/blog/2008/12/jquery-alert-dialogs/
//
// Usage:
//		jAlert( message, [title, callback] )
//		jConfirm( message, [title, callback] )
//		jPrompt( message, [value, title, callback] )
// 
// History:
//
//		1.00 - Released (29 December 2008)
//
//		1.01 - Fixed bug where unbinding would destroy all resize events
//
// License:
// 
// This plugin is dual-licensed under the GNU General Public License and the MIT License and
// is copyright 2008 A Beautiful Site, LLC. 
//
(function($) {

	$.alerts = {

		// These properties can be read/written by accessing $.alerts.propertyName from your scripts at any time

		verticalOffset: -100, // vertical offset of the dialog from center screen, in pixels
		horizontalOffset: 0, // horizontal offset of the dialog from center screen, in pixels/
		repositionOnResize: true, // re-centers the dialog on window resize
		overlayOpacity: .0, // transparency level of overlay
		overlayColor: '#333', // base color of overlay
		draggable: false, // make the dialogs draggable (requires UI Draggables plugin)
		okButton: '确定', // text for the OK button
		cancelButton: '取消', // text for the Cancel button
		dialogClass: null, // if specified, this class will be applied to all dialogs

		// Public methods

		alert: function(message, _title, _callback) {
			var title = typeof(_title) === 'string' ? _title : '提示信息';
			var callback = typeof(_title) === 'function' ? _title : _callback;
			$.alerts._show(title, message, null, 'alert', function(result) {
				if (callback) callback(result);
			});
		},

		confirm: function(message, _title, _callback) {
			var title = typeof(_title) === 'string' ? _title : '提示信息';
			var callback = typeof(_title) === 'function' ? _title : _callback;
			$.alerts._show(title, message, null, 'confirm', function(result) {
				if (callback) callback(result);
			});
		},

		prompt: function(message, value, title, callback) {
			if (title == null) title = 'Prompt';
			$.alerts._show(title, message, value, 'prompt', function(result) {
				if (callback) callback(result);
			});
		},

		// Private methods

		_show: function(title, msg, value, type, callback) {

			$.alerts._hide();
			$.alerts._overlay('show');

			$("body").append(
				'<div id="popup_container" class="confirm md-effect-8">' +
				'<div class="popup_content">' +
				'<div class="con-title">' +
				'<h4 id="popup_title"></h4>' +
				'</div>' +
				'<div id="popup_message" class="con-body"></div>' +
				'</div>' +
				'</div>'
			)
			if ($.alerts.dialogClass) $("#popup_container").addClass($.alerts.dialogClass);

			// IE6 Fix
			var pos = ('undefined' == typeof(document.body.style.maxHeight)) ? 'absolute' : 'fixed';

			$("#popup_container").css({
				position: pos,
				zIndex: 99999,
				padding: 0,
				margin: 0
			});

			$("#popup_title").text(title);
			$("#popup_content").addClass(type);
			$("#popup_message").text(msg);
			$("#popup_message").html($("#popup_message").text().replace(/\n/g, '<br />'));

			$("#popup_container").css({
				minWidth: $("#popup_container").outerWidth(),
				maxWidth: $("#popup_container").outerWidth()
			});

			$.alerts._reposition();
			$.alerts._maintainPosition(true);

			switch (type) {
				case 'alert':
					$("#popup_message").after('<div id="popup_panel" class="con-foot"><input type="button" value="' + $.alerts.okButton + '" class="btn do" id="popup_ok" /></div>');
					$("#popup_ok").click(function() {
						$.alerts._hide();
						callback(true);
					});
					$('#cancel-bar').click(function() {
						$.alerts._hide();
						if (callback) callback(false);
					});
					$("#popup_ok").focus().keypress(function(e) {
						if (e.keyCode == 13 || e.keyCode == 27) $("#popup_ok").trigger('click');
					});
					break;
				case 'confirm':
					$("#popup_message").after('<div id="popup_panel" class="con-foot"><input type="button" value="' + $.alerts.okButton + '" class="btn do" id="popup_ok" /> <input type="button" value="' + $.alerts.cancelButton + '" class="btn undo" id="popup_cancel" /></div>');
					$("#popup_ok").click(function() {
						$.alerts._hide(true);
						if (callback) callback(true);
					});
					$("#popup_cancel").add('#cancel-bar').click(function() {
						$.alerts._hide();
						if (callback) callback(false);
					});
					$("#popup_ok").focus();
					$("#popup_ok, #popup_cancel").keypress(function(e) {
						if (e.keyCode == 13) $("#popup_ok").trigger('click');
						if (e.keyCode == 27) $("#popup_cancel").trigger('click');
					});
					break;
				case 'prompt':
					$("#popup_message").append('<br /><input type="text" size="30" id="popup_prompt" />').after('<div id="popup_panel"><input type="button" value="' + $.alerts.okButton + '" class="btn do" id="popup_ok" /> <input type="button" value="' + $.alerts.cancelButton + '" class="btn undo" id="popup_cancel" /></div>');
					$("#popup_prompt").width($("#popup_message").width());
					$("#popup_ok").click(function() {
						var val = $("#popup_prompt").val();
						$.alerts._hide();
						if (callback) callback(val);
					});
					$("#popup_cancel").add('#cancel-bar').click(function() {
						$.alerts._hide();
						if (callback) callback(null);
					});
					$("#popup_prompt, #popup_ok, #popup_cancel").keypress(function(e) {
						if (e.keyCode == 13) $("#popup_ok").trigger('click');
						if (e.keyCode == 27) $("#popup_cancel").trigger('click');
					});
					if (value) $("#popup_prompt").val(value);
					$("#popup_prompt").focus().select();
					break;
			}
			var transition = $.support.transition;
			transition ? $('#popup_container').addClass('md-show') : $('#popup_container').removeClass('md-effect-8')
				// Make draggable
			if ($.alerts.draggable) {
				try {
					$("#popup_container").draggable({
						handle: $("#popup_title")
					});
					$("#popup_title").css({
						cursor: 'move'
					});
				} catch (e) { /* requires jQuery UI draggables */ }
			}
		},

		_hide: function(type) {
			var transition = $.support.transition,
				hiden = function() {
					$("#popup_container").remove();
					$.alerts._overlay('hide');
					$.alerts._maintainPosition(false);
				};
			if (transition && !type) {
				$('#popup_container').removeClass('md-show');	 
				$('#popup_container .popup_content').bind('bsTransitionEnd', function() {
					hiden()
				})
			} else {
				hiden()
			}
		},

		_overlay: function(status) {
			switch (status) {
				case 'show':
					$.alerts._overlay('hide');
					$('body').append('<iframe id="popup_overlay"></iframe>');
					$("#popup_overlay").css({
						position: 'absolute',
						zIndex: 99998,
						top: '0px',
						left: '0px',
						width: '100%',
						height: $(window).height()-10,
						background: $.alerts.overlayColor,
						opacity: $.alerts.overlayOpacity
					});
					break;
				case 'hide':
					$("#popup_overlay").remove();
					break;
			}
		},

		_reposition: function() {
			var top = (($(window).height() / 2) - ($("#popup_container").outerHeight() / 2)) + $.alerts.verticalOffset;
			var left = (($(window).width() / 2) - ($("#popup_container").outerWidth() / 2)) + $.alerts.horizontalOffset;
			if (top < 0) top = 0;
			if (left < 0) left = 0;

			// IE6 fix
			if ('undefined' == typeof(document.body.style.maxHeight)) top = top + $(window).scrollTop();

			$("#popup_container").css({
				top: top + 'px',
				left: left + 'px'
			});
			$("#popup_overlay").height($(window).height()-10);
		},

		_maintainPosition: function(status) {
			if ($.alerts.repositionOnResize) {
				switch (status) {
					case true:
						$(window).bind('resize', $.alerts._reposition);
						break;
					case false:
						$(window).unbind('resize', $.alerts._reposition);
						break;
				}
			}
		}

	}

	// Shortuct functions
	jAlert = function(message, title, callback) {
		$.alerts.alert(message, title, callback);
	}

	jConfirm = function(message, title, callback) {
		$.alerts.confirm(message, title, callback);
	};

	jPrompt = function(message, value, title, callback) {
		$.alerts.prompt(message, value, title, callback);
	};

})(jQuery);